cn-pay/src/wechat/gateways/mp.gateway.js

a alipay wechat pay lib

'use strict';

const util = require('../util');

module.exports = class {
  constructor(config) {
    this.config = config;
  }
  pay(payload) {
    payload.appid = this.getAppId();
    payload.trade_type = this.getTradeType();
    payload.sign = util.generateSign(payload, this.config.key);
    return new Promise((resolve, reject) => {
      util.request('/pay/unifiedorder', payload, this.config.key)
        .then(data => resolve(this.getOutPut(data)))
        .catch(reject);
    });
  }
  getAppId() {
    return this.config.app_id;
  }
  getTradeType() {
    return 'JSAPI';
  }
  getOutPut(data) {
    const output = {
      appId: data.appid,
      package: 'prepay_id=' + data.prepay_id,
      timeStamp: parseInt(Date.now() / 1000).toString(),
      nonceStr: util.createNonceStr(),
      signType: 'MD5',
    };
    output.paySign = util.generateSign(output, this.config.key);
    return output;
  }
};